/Engine/Source/Runtime/Engine/Public/ReplaySubsystem.h
Add or update an existing event in the recording replay, see AddEvent as well
void AddOrUpdateEvent ( const [FString](API\Runtime\Core\Containers\FString) & EventName, const [FString](API\Runtime\Core\Containers\FString) & Group, const [FString](API\Runtime\Core\Containers\FString) & Meta, const [TArray](API\Runtime\Core\Containers\TArray)< uint8 > & Data )